Railroad switch and signal.



P ATENTED JAN. 3, 1905.

L. GRIFFITH.

RAILROAD SWITGH AND SIGNAL.

APPLICATION FILED AUG. 13, 1904.

3 SHEET8SHBBT 1.

PATENTED JAN. 3, 1905.

L. GRIFFITH.

RAILROAD SWITGH AND SIGNAL.

APPLICATION FILED AUG.13, 1904.

3 SHBETS-SHBET 2.

AMA 6AM Emu Atom No. 779,156. v PATENTED JAN. 3, 1905.

- L. GRIFFITH.

RAILROAD SWITCH AND SIGNAL.

APPLICATION FILED AUG. 13, ,1904.

3 SHEETS-SHEET 3.

v No. 779,156.

I UNITED STATES Patented January 3, 1905.

ATENT FFICE.

RAILROAD SWITCH AND SIGNAL.

SPECIFICATION forming part of Letters Patent No. 779,156, dated January 3, 1905.

Application filed August 13, 1904. Serial No. 220,589.

"b all 1072/0171, it 772 007 concern:

Be it known that I, LAWRENCE GRIFFITH, a citizen of the United States of America, residing in the city of Yonkers, county of W est- .chester, and State of New York, have invented provide greater adjustability and efficiency of.

the mechanism transmuting power from rotary to reciprocal, and vice versa, than has heretofore been accomplished.

To these ends my invention consists of certain details of construction of the parts by which motion is transmuted.

I hereinafter describe my invention and point out the particular features in the claims, having reference to the accompanying drawings, in which similar numerals of reference indicate similar parts throughout the various views, of which-- Figure 1 is a plan view of part of a railroadswitch and a switch-stand constructed in accordance with my invention. Fig. 2 is a perspective view of the switch-stand shown in Fig. 1. Fig. 3 is a cross-section on the line 3 3 of Fig. 1 in the direction indicated by the arrows. Fig. 4 is a detail view of a connection between the rotating target-shaft and the reciprocating switch-rod, in which the shaft is adapted to rotate through one hundred and eighty degrees. Fig. 5 is an end elevation of Fig. 4. Fig. 6 is similar to Fig. 4, except that the shaft is adapted to rotate through ninety degrees. Fig. 7 is an end elevation of Fig. 6. Fig. 8 is a similar view to Fig. 6, showing a modified construction. Fig. 9 is an end elevation of Fig. 8. Fig. 10 is a crosssection on the line 10 10 of Fig. 6 in the direction indicated by the arrows and with the connecting lug or crank removed. Fig. 11 is a detail side View showing the crank-arm offset from the center line of the top shaft and connected rigidly therewith. Fig. 12 is a plan view of Fig. 11. Fig. 13 is a side view similar to Fig. 11, except that the shaft has additional bearing-surface. Fig. 14 is asirnilar view to Fig. 13, except that the crank-arm is adjustable. Fig. 15 shows adaptation of invention to a semaphore-blade.

1 1 are switch-points, and 2 the rod for sliding the same with reference to the rails 3 3.

4 is the target-shaft of the switch-stand 5. It is the mechanism by which rotary motion from the target-shaft 4 is changed into or transmuted to reciprocating motion of the rod 2, or vice versa, when reciprocating motion of a rod 2 to the rotary motion of a semaphore= blade 4,with which my invention is concerned.

I now describe my invention as applied to a target-shaft and switch-rod, it being readily understood that the same may be adapted to mechanism connected with a semaphore-blade by persons skilled in the art.

6 is the operating-lever of the switch-stand operatively connected with the shaft 7 carrying pinion 8, which pinion engages with the teeth of the gear 9, said gear 9 being connected with and adapted to rotate the targetshaft 4.

10 is the well-known locking device for the lever 6.-

The switch-stand 5 is adapted to be spiked or otherwise fastened to the ties.

In order to provide greater adjustability of the stand than has heretofore been accomplished, I provide a two-ended crank-arm 11. By this construction it will be understood that the switch-stand may be set upon either side of the rails 3 3 and the lever 6 of the stand set on the side thereof away from the rails 3. In many cases it is desirable to provide a larger throw than has heretofore been accomplished. I therefore offset the crank-arm 11 from the center line of the target-shaft 4, and in order to render the device as cheap as possible I construct the said crank-arm 11 rigid with reference to the target-shaft 4. In order to render the connection between the crank-arm 11 and the switch-rod 2 adjustable, I screw-thread the crank-arm on each of its ends and provide a screw-threaded nut or lug 12. It will be readily understood that the nut 12 may be double-ended, as shown in Fig. 6, and that the throw of rod 2 may be adjusted by a half-turn of said nut 12 on crank-arm l1 and that the nut 12 is connected with rod 2 in any ordinary manner, as by pin 13.

Fig. 8 shows a construction similar to that shown in Fig. 6, except that the nut 12 is and the rod 2, so long as the said crank-arm,

or rather its connection with the target-shaft 1, is offset from the center line of the targetshaft by said arm, as shown by the arm 11 of Fig. 11.

In Figs. 14:, 17, 18, and 19 I show my devices supplied with an additional bearing-surface 14;.

In Fig. 20 a semaphore-blade is shown, and it will be understood that the power to the device is supplied in the opposite direction from that described with reference to the switch-points.

What I claim, and desire to secure by Letters Patent, is-

1. In railroad switch and signal devices the combination of a shaft adapted to be rotated, a crank-arm borne by said shaft and offset from the center line thereof and means for adjustably connecting said crank-arm with a reciprocating rod.

2. In railroad switch and signal devices the combination of a shaft adapted to be rotated, a crank-arm borne by said shaft and offset from the center line thereof and means for adjustably connecting said crank-arm with a reciprocating rod, which consists of a screwthreaded pin adapted to be screwed into a lug offset from said shaft, said pin bearing a lug adapted to be connected with said rod.

3. In railroad switch and signal devices, the combination of a shaft adapted to be rotated, a crank-arm borne by said shaft and offset from the center line thereof, bearings for said shaft on each side of said arm, and means for adjustably connecting said arm.

In witness whereof I have hereunto set my hand this 8th day of August, 1904.

LAW. GRIFFITH.

Witnesses: I

H. V. N. PHILIP, JAooB L. KORNICKER. 

